New research reveals that buyers of hedonistic, luxurious products often feel guilty about their indulgent purchase — but that bundling even a small utilitarian feature with the product can assuage this guilt and make consumers more likely to buy and increase willingness to pay.

Shoppers bringing their own bags help reduce the adverse environmental impact of plastic bags. New research shows, however, that the environment is not the only winner. Environmentally conscious shoppers are inspired to buy more expensive organic products, and reward themselves with unplanned indulgent purchases — a boon to grocery stores.